EFFECTS OF GASES UNDER PRESSURE .1. INFLU ENCE ON THERMAL INACTIVATION OF PEROXIDASE AND ON THERMAL-DEGRADATION OF CHLOROPHYLLS

The effects of carbon dioxide under pressure between 0 and 6 bars on t he pH and the rate of thermal inactivation of horse radish peroxidase were studied. The presence of this gas induces a pH decrease and the r ate of enzyme thermal inactivation increases when the pressure of carb on dioxide is increased. Results show that thermal stability of chloro phylls a or b decreases in the presence of carbon dioxide. Finally, bl anching time is reduced in a nitrogen protoxide atmosphere under press ure higher than 3 bars.